Air-pump.



P. P, BOURNE.

AIR PUMP.

APPLIUATIUN FILED M3114, 1907.

Patented oct, 27, '1908.

4sists in UNITED sTATEs PATENT onerosi.

PHILLIPS P. BOURNE, OF SOMERVILLE, MASSACHUSETTS, ASSIGNOR TO THE BLAKE da VNOWT'ES STEAM PUMP WORKS, A CORPORATION OF NEW JERSEY.

AIR-PUMP.

No. 901,945.v

To all whom it may concern.'

Be it known that I, PHILLIPS P. BOURNE, a citizen of the. United States, residing at Somerville, county of Middlesex, and State of Massachusetts, haveinvented certain new and useful Improvements in Air-Pumps, fully described and represented in the following specification, and the accompanying drawings, forming a part of the same.

This invention relates to an improved air pump of the type now well known as double acting suction valveless pumps, the especial object of the invention being to provide a pump of this class in which the air and water may be efficiently removed from a condenser and delivered, and which may have its suction inlet at the'bottom of the pump, so that the condenser may be placed very low. This low placing of the condenser is especially important in small boats, such as torpedoboats and yachts, but my improved air pump is of general application.

The especial feature of the invention conroviding theI pump with suction valves be ow the plunger', so that the water, with some ofthe air and uncondensed vapors, is admitted to the cylinder below the plunger through the suction valves and delivered on the down-stroke, while the air and uncon densed vapor chiefly enter the pump cylinder above the plunger through the valveless suction and is delivered on the up-stroke.

VThe referred embodiment of the invention is illustrated in the accompanying drawing forming a part of this speciiication, in which thepump is shown in central vertical section, and this construction will now be described and the features forming the invention then specifically pointed Iout in the claims.

'lhe pump illustrated is of the same type as that shown and described in United States Letters Patent to F. M. Wheeler, N o. 674,819,

datedMay 21st, 1901, and need be described here only to eirplain' the present invention.

.'A is the vertical pum) cylinder, B the )lunger with plunger rod t, C the suction inet, and l) the delivery. lhe valveless suctionA passage c extends about the central wrtion of the cylinder A, and is connecte( at one side by a passage 1() to the suction inlet C at the octtom of the pum Below the cylinder A a suction valve p ate d extends Spe'cicaton of Letters Patent.

Application led September 14, 1907.

Patentes oct. er, isos. semi No. 392,328. Y

across so as to form a suction chamber 11, from which the liquid passes through suction valves l to the bottom of the cylinder A below the plunger B and to the pulsation cham ber 12, from which the liquid is delivered through force valves 2 and vertical passage 13 to the main delivery I) at the top ci' the pump.. Some of the air and. uncondensed vapor entering at the suction inlet C passes through the foot valves 1, and is delivered to passage 13, but the .most of the air and' uncondensed vapor rises through passage 1U, enters the cylinder above the plunger B through valveless suction passage c, and is delivered at the top of the cylinder to the delivery C. through force valves 3.

It will be understood that the invention is not limited to the exact type ol pump shown, nor to the specific arrangement of suction and delivery passages and valves illustrated, but that modifications may be made in the construction shown within the invention as defined by the claims. Y

The invention is applicable to pumps having single cylinders, or with two or more cyl inders, and the plungers may be driven by any suitable means.

What I claim is 1. In a vertical double acting pump, a

pump cylinder having a central valvcess suction passage, a plunger, a suction chamber below the cylinder, a suction inlet connected to the suction passage and suction chamber, and suction valves controlling admission from the suction chamber to the cylinder below the plunger. 2. The combination with a vertical pump cylinder A having central vaivelcss suction passage c and plunger B, of suction inlet C at the bottom of the pump, passage 10 connu necting the suction inlet and the' valvelcss suction passage, plate l extending across the bottom of the cylinder and Aforming suction and ulsation chambers 11 12,`aud suction and orce valves 1, 2 controlling admission and delivery below the plunger.

In testimony whereof, I have hereunto set my hand, in the presence of two subscrib- A. S. CLARK,

` JULIUs MEYERS. 

